<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>语法</title>
	</head>
	<body>
		
		<!--
			1.创建script标签,
			2. 在标签中写代码
		-->
		<script type="text/javascript">
			// 创建一个弹窗
			alert("hello")
		</script>
	</body>
</html>
